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Finding the Fourth Proportional to 387,391.43, 580,754.31 and 134,639.08

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Solution

The fourth proportional to 387,391.43, 580,754.31 and 134,639.08 is: 201,842.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,391.43 : 580,754.31 = 134,639.08 : x
  2. Step 2: Convert to fraction form
    387,391.43/580,754.31 = 134,639.08/x
  3. Step 3: Cross multiply
    387,391.43x = 580,754.31 × 134,639.08
  4. Step 4: Simplify right side
    387,391.43x = 78,192,224,047.65
  5. Step 5: Solve for x
    x = 78,192,224,047.65/387,391.43
  6. Step 6: Final answer
    x = 201,842.94

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.